now allegeddedly james holmes? what is the profile? >> well, it's interesting what you said that these are typical. whether there's a profile. because there is no single profile. that's for sure. but between the three of them, oddly enough, we have the three different profiles. because nearly all of these mass murderers turn out to be one of those three profiles. eric harris was a psychopath in the clinical sense meaning no empathy, no remorse, no feeling for others. dylan klebold at columbine was a deep suicidally depressed kid. and joe was... cho, delusional, out of touch with reality, deeply mentally ill. nearly all killers fall into one of those categories but the three categories are completely different. if you want to understand their thought process and how they get to murder, completely... you have to separate them into those groups. completely different. >> ifill: professor fox, one of the things that came out of watching james holmes last week in court is that people thought he was either insane or medicated or very clever i